Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4799939 | Erodable agglomerates and abrasive products containing the same | Ulrich Bloecher | 1989-01-24 |
ED
Ernest J. Duwell
Overall (1989): #116,708 of 140,708Top 85%
1
Patents 1989